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Hydrolysis of PU waste

Hydrolysis of PU waste results in the formation of polyethers and polyamines that can be used as starting materials for producing foam. In this process, powdered PU waste is reacted with superheated steam at 160-190°C and the polymer gets converted in about 15 min to a liquid heavier than water. The liquid is a mixture of toluene diamine and propylene oxide (polyether diol), the former accounting for 65—85% of the theoretical yield ... [Pg.723]

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Chemical Recovery of Flexible PU Foam Wastes by Hydrolysis

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